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Planar antenna structure and radio device

  • US 20040145527A1
  • Filed: 01/07/2004
  • Published: 07/29/2004
  • Est. Priority Date: 01/15/2003
  • Status: Active Grant
First Claim
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1. A planar antenna structure for a radio device having at least one operating band and comprising a ground plane, radiating element, feed element, feed circuit and an antenna port, wherein the radiating element is galvanically isolated from other conductive parts of the radio device, there is an electromagnetic coupling between the radiating element and feed element to transfer transmitting energy to field of the radiating element and receiving energy to field of the feed element, and the feed circuit is reactive and it connects an antenna feed point in the feed element to the antenna port and ground plane in order to set said at least one operating band to a desired range on the frequency axis and to match the antenna.

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